Merge pull request #4870 from glennmatthews/gfm-issue-4862

Treat minified/packed JS/CSS files as binary. Fixes #4862

.gitattributes

@@ -1 +1,5 @@
 *.sh text eol=lf
+# Treat minified or packed JS/CSS files as binary, as they're not meant to be human-readable
+*.min.* binary
+*.map binary
+*.pack.js binary